Clutch.



J. E. WILLGOX.

CLUTGE.

D APPLICATION FILED SEPT. 23, 1912. 9

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WITHEESEE; IFIVEEITUFV wmmm a THE NORRIS PETERS c0.. FHOTO-LITHO.. WASHINGTON, D. c.

J. E. WILLGOX.

CLUTCH.

APPLICATION FILED SEPT. 23. 1912.

1,1 SLG A. Patented M21119, 1915.

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J. E. WILLOGX CLUTCH.

APPLICATION FILED SEPT. 23, 1912.

1,1 31,6 11, Patsn'sesi Mar. 9 191 5.

J. E. WILLGOX.

CLUTCH.

APPLICATION FILED SEPT. 23, 1912.

1 131 641, Patented Mar.9,1915.

4 SHEETS-SHEET 4.

UNITED STATES FATENT @FFTCE.

JAMES E. 'WILLGOX, OF MALDEN, MASSACHUSETTS, ASSIG-NOR, BY DIRECT AND MESNE ASSIGNMENTS, TO FRANK WEAR, OF GILMANTON, NEN HAMZESHIRE.

CLUTCH.

Specification of Letters Patent.

Patented Mar. 9, 1915.

Application filed September 23, 1912. Serial No. 721,849.

To all whom it may concern Be it known that I, JAMEs E. l/VILLcoX, a citizen of the United States, and a resident of Malden, in the county of MiddleseX and State of Massachusetts, have invented a new and pseful Improvement in Clutches, of

struction shown without departing from the spirit of my invention.

In the drawings, Figure 1 is a longitudinal section of my improved clutch; Fig. 2 is an end view thereof with the shipper 22 removed; Fig. 3 is a section taken on the line 33 of Fig. 1, looking toward the left and illustrating the righthand face of the inner clutch member 6; Fig. 4 is an end view with the shipper 3% removed looking toward the right of Fig. 1. Fig. 5 is an end view of the sleeve 28 looking toward the left. Fig. 6 is a section on the line 33 of Fig. 1, looking toward the right and illustrating the left-hand face of the clutch member 3. Fig. 7 is a fragmentary top view of the clutch as seen from the point X in Fig. 3.

In the particular drawings selected for more fully disclosing my invention, 1 represents the driving shaft and 2 the driven shaft. The disk-shaped clutch member 3 is secured to the shaft 2 by any suitable means such as the key 4 and is provided with the V-shaped annular groove or channel 5, 5. The interior clutch member 6, in order to compensate for differences in alinement of the two shafts, has a convex-curved or arc-shaped bearing surface on the driveshaft, as shown at 6, so that it can oscillate thereon and not jam or become bound. V- shaped friction shoes 7 7 are secured to the member 6 near its periphery by the screws 8 and sockets 9, or in any other suitable manner, and said friction shoes, herein shown as four in number, are arranged respectively over the lugs 10 which fit into corresponding recesses in the shoes.

The clutch member 3 is provided as shown with a cooperating gripping member, herein shown as an overhanging ring 11, having an annular V-shaped groove or channel cooperating with the friction shoes on one side of the member 6, said groove or channel being shaped correspondingly to the groove or channel 5, 5 aforesaid. In the present instance the ring 11 is secured to the member 3 by bolts 12, four pairs of which pass through the members 3 and 11 near their peripheries and each terminates in an eye 14. A trunnion 15 of each of the toggles 16 is pivoted in the eyes 14 of each pair of bolts, and the other end of each bolt is provided with a nut 13 as shown. Each toggle is provided with a cam surface 17 which takes into a seat in a sliding block 18 arranged to slide up and down the outer vertical surface of the member 3, and the other end of each toggle preferably is rounded and takes into a suitably shaped groove in the clevis or sliding collar 20 which is provided with an annular groove for receiving the collar 21 of the shipper 22, pivoted at 23. Resilient means are provided for normally separating the ring 11 from the member 3 and in the present instance I have shown a spiral spring 24 inserted in sockets bored in the proximate faces of said members.

Secured by the screws 42 to the peripheral portion tl of the ring 11 are two locking segments 40 each about ninety degrees in length which interlock with similar segments l1 secured by the screws 43 to the peripheral portion 45 of the clutch member 3. These segments extend toward but do not quite touch the portions 44, 4:5, respectively as shown in Fig. 7.

The transmitting hub 25 is keyed at 26, or otherwise suitably secured to the driveshaft 1, and its right-hand end, in the present instance, is provided with a plurality of driving lugs 27, herein shown as four in number, which may have any suitable shape. In the present instance the lugs have their engaging faces arranged radially with respect to the center of the shaft and are adapted to take into correspondingly shaped recesses in the hub of the member 6 and loosely fit therein as indicated in Fig. 3 so as to permit the oscillation of said member 6 about the driving shaft as above set forth. The locking sleeve 28 is provided with a plurality of locking lugs 29, two of which as shown at 30, project into correspondingly shaped grooves 31 in the transmitting hub,

and are arranged to cooperate with the lugs 32 which extend from the under side of the ring 11. The yoke 33 of the shipper 3 1, pivoted at 35, fits into an annular groove in the locking sleeve 28. A spiral spring 36 is secured to the ring 37 of the shipper 34: and its other end is provided with a ring 38, arranged to be held by the hook 39 of the shipper 22.

The operation is as follows: The shipper 22 is moved toward the left, to the position shown in Fig. 1, and the cam surface 17 of each of the toggles 16 causes the sliding blocks 18 to move outwardly, so that the bolts 12 will draw the members 3 and 11 together and cause them to grip the friction shoes 7 7. The interior clutch member 6, which carries said friction shoes, being engaged with the transmitting hub 25 through the lugs 27, 27 of the latter, and the members 3 and 25 being keyed to their respective shafts, it follows that shaft 2 will be clutched to the drive shaft 1. The camsurface 17 having been pushed beyond a dead center, the clutch will remain 100 red.

In order to prevent any accidental slipping and consequent wear on the frictlon shoes, the shipper 34 may now be moved to the right so as to bring the driving lugs 29 in the path of the lugs 32, and the ring 38 is then hooked over the hook 39, so that the spring 36 will draw the two shippers together. If the shipper 3 1 has been thrown at such time as to bring the lugs 29 into engagement with the lugs 32, it will be obvious that the clutch member 3, through its ring 11, is positively locked to the locking sleeve 28 and a portion of the load is thereafter carried by said locking sleeve. If, however, the shipper 34 is thrown at any other time, so as merely to bring the lugs 29 into the path or on top of the lugs 32, but not in cooperative engagement therewith, for example, as shown in Fig. 1, then it will be obvious that any slipping between the clutch member 3 and the interior clutch member 6 will bring said lugs into cooperation and prevent any further slipping.

It will be noted that the function of the bolts 12 is limited to drawing the members 3 and 11 together and that all strain between said members is carried by the segments 10, 41, instead of being carried by the bolts, so that, therefore, the shafts may be readily unclutched irrespective of the load carried thereby.

I claim:

1. A clutch, comprising in combination a driving shaft, a driven shaft, a clutch member fixed to the driven shaft and provided near its periphery with a double V-shaped channel, an interior clutch member secured to rotate with the driving shaft, a plurality of lugs on the faces of said interior clutch member, a plurality of friction shoes mounted on said faces and each having a recess for receiving one of said lugs, said shoes cooperating with said channel, and means for bringing said clutch members into engagement.

2. A clutch comprising in combination a driving shaft, a driven shaft, a clutch member mounted on each shaft, means for bringing the clutch members into engagement, a shipper for actuating said means, means for positively locking the clutch member on one shaft in engagement with the other shaft, a second shipper for actuating the last mentioned means, and spring means connecting said shippers.

A clutch, comprising in combination a driving shaft, a driven shaft, a clutch member secured to said driven shaft, a cooperating clutch member, a driving hub rigidly connected to said driving shaft, lugs on said driving hub engaging recesses in the said cooperating clutch member, a locking collar arranged to slide on, and rotate with, said hub, and lugs on said locking collar arranged to engage lugs on the clutch member mounted on said driven shaft.

A clutch, comprising in combination a driving shaft, a driven shaft, a clutch member mounted on each shaft and means for bringing said members into engagement,

said means comprising a lever and a block arranged to slide along the outer face of one clutch member, said block being pro vided with a cam seat and one arm of said lever being provided with a cam surface cooperating with said cam seat.

A clutch, comprising in combination a driving shaft, a driven shaft, a clutch member fixed to the driven shaft and provided near its periphery with a V-shaped channel, an overhanging ring having an oppositely disposed V-shaped channel, an interior clutch member having a convex-curved bearing surface on said driving shaft, said interior clutch member being provided with a four-sided friction shoe cooperating with said channels, resilient means normally separating said ring and member, a pair of bolts passing through said clutch member and ring and a toggle for moving said belts with respect to said clutch member and ring, whereby said friction shoe will be gripped between the same.

In testimony whereof, I have hereunto subscribed my name this 21 day of Sept. 1912. V

JAMES E. WILLCC'X.

Witnesses:

E B. TOMLINSON, Gno. K. Woonwonrn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

